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Jb4 BMW BMW 335 Performance Jb4 135 335 intakes
JB4 Performance Tuner
N20/N26 JB4 Upgrades

N20 Replacement JB4 Board



Update or replace your JB4 control box with the latest options listed below. Note most 2014+ vehicles include electronic wastegates and will benefit from the EWG board. If upgrdaing a previous PWG system to EWG we suggest you modify the JB4 harness by cutting off the black ground & red power wires. Also note the purple MAF harness is no longer used for any N55 application so this can also be cut off the harness to clean it up. Note replacement boards do not include an enclosure and will ship with the latest production firmware. In the case of F series this is OBDII CANbus based firmware.

Jb4 N55 F30 BMW EWG upgrade board
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$175.00
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F Series OBDII CANbus Interface



Changes the connection point for the JB4 CANbus from POSI-TAP connectors to a fully plug and play OBDII cable. The OBDII cable is routed through a preexisting hole in the firewall for easy installation and includes a MOLEX connector and pigtail for easy installation. Requires special JB4 OBDII firmware that is posted to n54tech.


CANbus Interface JB4 N55 BMW

$35.00
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N20/N26 Stage2 FlexFuel Wires



For those of you wanting to take advantage of E85 fuel mixtures you'll need this additional fueling connector.

BMW Flexfuel

$25.00
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JB4 F Series EWG Add On Connector



For 2014+ N20/N26 motors that have an electronic wastegate. This add on patch allows your JB4 to directly control your electronic wastegate raising the boost ceiling for more heavily modified N20/N26 vehicles. Additional information and directions are posted here: http://www.n54tech.com/forums/showthread.php?t=23709

BMW Flexfuel

$35.00
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JB4 Billet Aluminum Enclosure



Our most protective case in the JB4 line-up. The sleek, stylish JB4 billet aluminum enclosure withstands drops, shocks and bumps while protecting electronics from dirt and water. CNC machined with a rubber sealing ring. Ideal for all weather F chassis applications. Made in the USA. Compatible with all BMS JB4 & Stage1 tuners.
$59.00
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JB4 plastic all weather enclosure



A plastic version of our fully weather proof JB4 enclosure. To install remove the existing harness amp cover and attach to the JB4 board using the included hardware. The board and harness head then fit inside the new water resistant enclosure.
$20.00
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High Temp JB4 Enclosure



This new enclosure is made from a temperature resistant resin and is a direct replacement for all existing JB4 enclosures. Other than being able to withstand higher temperatures before deforming there is no functional difference between this and the previous enclosure.
$10.00
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Replacement POSI-TAPS (2)



For tapping wires. Electrical connectors require no crimping and simply hand tighten.
Posi Tap connector
$5.00 Includes Free Shipping.
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